Wrench.



RPERNANDB'Zf WRENCH.

APPLICATION FILED MAY 1, 1912.

Patented Oct. 29, 1912.

P Fernandez against movement, and also PEDRO FERNANDEZ, VICTORIA, TEXAS.

WRENCH.

Specification of Letters Patent.

Patented (Oct. 19312.

Application filed May 1, 1912. Serial No. 694,342.

To all whom it may concern:

Be it known that I, Pnono FERNANDEZ, a citizen of the United States, residing a Victoria, in the county of Victoria, State of Texas, have invented certain new and useful Improvements in Wrenches; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in wrenches, and particularly to the type of sliding inner jaw.

The principal object of the invention is to provide a simple device of this character having means for locking the sliding jaw means for said result, against the simultaneously accomplishing and forcing the sliding jaw work. 7

Other objects and advantages will be ap: parent from the following description and with particular reference to the accompanying drawings.

In the'drawings: Figure l is a side elevation of a wrench made in accordance with my invention, Fig. 2 is a -view similar to Fig. 1, certain parts being broken away.

Referring particularly to the drawings, 10 represents the shank of the wrench which comprises the spaced members 11 and 12, on

the outer edge faces of which are formed the series of, rack teeth 13 and 13. On one end of the shank is a handle 14, while on the opposite end is a stationary jaw 15. bracing the members 11 and 12, and slidable thereon is the movable jaw'16, both of the jaws l5 and 16 having the extensions 17 and 18 provided with the jaw teeth 19 for en gagement with the work. Inwardly of the sliding jaw 16, and embracing the shank 1s a locking yoke member 20 on the inner face of the ends of which are formed respectively the teeth 21 and 22, for. engagement with the rack teeth 13 and 13 Secured at its center to the yoke member and engaging with its opposite ends against the inner faces of he members 11 and 12 is an S-shaped member 23 which normally cants the yoke member so that its teeth are always in yielding engagement with the rack'teeth. -'Onthe end of the yoke and directly below the extension 18 of the jaw 16 is pivoted a cam lever 21 having a cam face 25 for engagement with the said extension of the jaw 16.

In the operation of the wrench the outer jaw is brought into engagement with the pipe, and then .the inner jaw is moved up until it engages on the opposite side of the pipe. The locking yoke is then slipped along-the shank into close proximity to the sliding jaw'whereupon the cam lever 2% is rotated until the handle 24: is adjacent the shank. This causes the cam face 25 to bear against the extension 18 of the jaw 16, and simultaneously rocks the locking yoke to bring its teeth into positive engagement with the rafters of the shank, and to force the movable jaw tightly against the work. The S-shaped spring holds the locking yoke in a position so that its teeth are always in engagement with the racks, thus making it possible to slide the. yoke toward the sliding jaw, but making it im possible for the yoke to be moved in the opposite direction until it is cornered so that its teeth are out of engagement with the racks of the shank. Secured at its opposite ends, respectively, to the sliding jaw 16, and the yoke 20 is a coil spring 26 which normally draws the jaw downwardly toward the yoke, and is put under tension when the cam lever 24: is thrown into iocking position. When the jaws of the wrench are engaged with a pipe, the teeth bite into the pipe, so that when the lever 24 is thrown outwardly, the jaw 16 will not readily release itself from the pipe, except when assisted by the hand of the user. The spring 26 will auto matically draw the jaw 16 away from the pipe when the lever 2st is thrown outwardly.

' What is claimed is:-

1. In a wrench, a shank having racks on the front and rear edges thereof, a stationary outer jaw, a slidable inner jaw, a rocking locking member having teeth for engagement with the racks, and a cam lever on one end of the locking member for engagement with the slidable jaw, whereby said slidable jaw is forced against the work and the locking member rocked into positive engagement with the racks.

2. In a wrench, a longitudinally slotted shank having racks on the front and rear edges, a stationary outer jaw, an inner jaw slidable on the shank, a yoke plate slidable on the shank, teeth on the yoke for engagement with the racks, an Sshaped spring on the yoke engaging the walls of the slot of the shank for normally canting the yoke into engagement with the racks, and a cam locking member having teeth jaw is force-: against the Work 21116 the locking -menfz er rocked into positive engagement with the racks,- zmd resilient means between the inner jaw aw} the locking member 5017 withdrawing said inner jaw from teeework when the cam lever is released.

pi'voiiflly can 4 Jamie 2mm: :1" L 9,11 Q ihe flick-bile r w ldaneeusiy seic'i jaw against thewew; and track the inte locking with the a Wrench, a, shank having racks on the how; and real edges thereof, smiienar y outer aw, a sliiieb'le inner few, a rocking 1501* engage a with the racks; my a, cam leveren of the locking member fer engagement 1 elidzhle jaw, whereby said slidabiefume in presence twp Witnesses.

PEDRO FERNANDEZ.

Gommissioner of atems,

in testimony wherepf, I sLfiiX my slgnwge 

